SkyTrak 3606 Service Manual - Manual (Page 198)

Section 9
9-4
9.1 SAFETY INFORMATION
General
Petroleum-based hydraulic fluids are used in this vehicle.
Temperature increases occur to hydraulic fluid during
operation of various hydraulic functions. A heated petro-
leum-based hydraulic fluid presents a considerable fire
hazard, especially when an ignition source is present.
Hydraulic fluid has a flash point that ranges from 300° to
600° F (150° to 318° C) and an auto-ignition temperature
of 500° to 750° F (262° to 402° C).
Accordingly, periodically inspect all hydraulic system
components, hoses, tubes, lines, fittings, etc. Carefully
examine any deterioration and determine whether any
further use of the component would constitute a hazard.
If in doubt, replace the component.
Note: Residual pressure may remain in hydraulic
cylinders, hoses, valve bodies, components, etc. If the
hydraulic lines going to or from a component are taught,
slowly, carefully relieve (“bleed off”) pressure.
To relieve hydraulic pressure:
On units equipped with AUXILIARY HYDRAULICS,
PULL the knob on the manually-operated release valve
located at the rear of the frame (Fig. 9–2) beneath the
rear cover. The pressure in the auxiliary system should
be relieved. The pull knob on the valve is spring loaded
and will return when released.
The quick couplers can now be connected or
disconnected between the attachment and the vehicle.
For ALL units, when attempting to disconnect a hydraulic
line, coupler, fitting, or other component, SLOWLY
loosen the part involved. A hissing sound or slow
seepage of hydraulic fluid may occur in most cases. After
the hissing sound has ceased, continue removing the
part. Cap or otherwise block off the part to prevent further
fluid seepage. Wipe up any hydraulic fluid.
Hydraulic system maintenance will, at times, require that
the engine be operated. Always follow safety precau-
tions.
Figure 9–2. Pull the knob on the manually-operated
release valve located at the rear of the frame to relieve
pressure in the auxiliary hydraulic system.
9.2 SPECIFICATIONS
Refer to Section 2 General Information, Specifications
and Maintenance Instructions for hydraulic system speci-
fications.
9.3 HYDRAULIC PRESSURE DIAGNOSIS
Just as vehicle maintenance cannot be performed
without the proper tools and other equipment, hydraulic
system maintenance and problem diagnosis cannot be
properly performed without a hydraulic pressure
diagnostic kit (Fig. 9–3) and flowmeter kit (Fig. 9–4).
Sky Trak offers these kits, which include all of the neces-
sary fittings, couplers, hoses, gauges and laminated
guide sheets to test hydraulic system pressures and flow
rates on Sky Trak vehicles.
Figure 9–3. Hydraulic pressure diagnostic kit.
Contact Sky Trak or the nearest Sky Trak distributor for
ordering information.
WARNING: Hot hydraulic fluid can cause
severe burns. Wait for hydraulic fluid to cool
before servicing any hydraulic component.
WARNING: Escaping hydraulic fluid under
pressure can penetrate the skin, causing seri-
ous injury. Relieve hydraulic pressure before
servicing any hydraulic component.
WARNING: Risk of severe personal injury.
Before starting the engine, verify that all
hydraulic connections are properly tightened
and that all tools are removed from the vehicle.
OS0360
Manually-operated
Release Valve
(for OPTIONAL
Auxiliary Hydraulics)
MS1900 MS2040
Model 3606 • Origin 10/99